Producing anthraquinone-thiazoles.



UNITED STATES PATE T. OFFICE.

'FILiP KAGER, or MANNHE'IM, GERMANY, nssrenon T0 samscnn ANILIN a sona FABRIK, OF LUDWIGSHAFEN-ON-THE-RHINE, GERMANY, A CORPORATION.

PRODUCING ANTHRAQUINONE-THIAZOLES.

No Drawing.

Specification of Letters Patent. Application filed February 27, 1913. Serial No. 751,096.

Patented May 5, 1914.

To. all whom it may concern Be it known that I, FILIP KAnn, citizen of the German Empire, residing at Mannheim, Germany, have invented new and useful Improvements in Producing Anthraquinone-Thiazoles, of which the'following is-ai specification.

I have discovered that thiazole derivatives of anthraquinone can be obtained simply and easily by treating a Q-aminoanthraquinone body,'1n which the ortho position to the amino group is occupied by hydrogen, with a benzo-trichlorid body in the presence of sulfur. If desired, the reaction can be carried out in the presence of a suitable solvent or diluent, such for instance as naphthalene, nitrobenzene, and trichlor-' benzene. In this invention the employment of a compound which gives rise to sulfur is equivalent to the use of sulfur itself. As instances of such compound which give rise to sulfur, I mention sulfureted hydrogen and a metallic sulfid. In those cases in which, according to my invention, an anthraquinone compound containing vmore than one amino group in a beta position is employed for the purpose of producing compounds with more than one thiazole group, it is essential that each amino group have adjacent to it a position occupied by hydrogen. .The products obtainable are in part valuable initial materials for the production of coloring matters, in part they are coloring matters themselves.

The following examples will serve to illustrate further the nature of my invention, which, however, is not confined to these examples. The parts are b weight.-

Example 1: Boil toget er, for from 2to 3 hours, 120 parts of naphthalene, 30 arts of Q-amino-anthraquinone, 20 parts 0 sulfur, and 40 parts of benzo-trichlorid. When the mixture has cooled to about from 110 to 120 0., add 420 parts of toluene and,*when cold, filter off the anthraquinonethiazole, wash it with toluene and dry it.

possesses a constitution corresponding-to the formula tion corresponding-to the formula CuHs If desired, it can readily be purified by boiling it with sodium hypochlorite solution.

It dyes cotton, from a vat, deep lemonyellow shades of excellent fastness.

benzo-trichlorid, 20 parts of QLG-dianiino-anthraquinone and 30 parts of sulfur, until the formation of the coloring matter is comlete. At first a yellow solution is formed, rom which, during the boiling, large quantities of yellowcrystals separate out. These are filtered off while the mixture is warm,

and washed w1th benzo-trichlorid and alcoand benzaldehyde and possesses a constitui i s it I: 80 N Example 3: Boil together parts of mi 1 Example 6 Boil together, for from'l to v hol, and then dried. The -product is identical with that obtainable according to the foregoing Example 2 and is obtained in a good state of purity.

naphthalene, 20 parts of 2.6-diamino-an v thraquinone and parts of benzo-trichlorid, and pass a strong current of sulfureted hydrogen into the boiling mixture until the formation of the coloring matter is complete. Then dilute with 700 parts of toluene, filter off the product, wash 1t with toluene and alcohol, and dry it; His identical with the product of the foregoing Example 3..

naphthalene, 10 parts of 2.6-diamino-anthraquinone, 5- parts of sulfur and 25 parts of '2.4:-dichlor-benzo-trichlorid.a When the reaction is finished, take up the melt with toluene, whereupon the product isobtained in a ood state of purity, and constitutes a tetrac lor derivative of the thiazole described in the foregoing Examples 2, 3.,and

' 4. It robably possesses a constitution correspondmg to the formula Example 4: Boil together 200 parts of .Example 5: Boil together 100 parts of witnesses.

thiazol obtained is isomeric with that obtained from 2.6-diamino-anthraquinone and is also a vat coloring matter which dyes cotton deep lemon yellow, of excellent fast ness.

Example 7 Boil together, for from 3 to i-hours, 100 parts of ortho-dichlor-benzene, 20 parts of 2.3-amino-brom-anthraquinone, 10 parts of sulfur and 30 parts of benzo-trichlorid. When the mixture is cold, filter off the product, Wash it with benzene, and dry it. Any sulfur remaining in admixture with the product can be extracted with carbon disulfid, or with sodium sulfid solution. The compound obtained is a bromin derivative of the thiazole obtained according to the foregoing Example 1.

Now what I claim is Y 1. The process of producing thiazole derivatives of the anthraquinone series by I treating a 2-amino-anthraquinone body, in

which the ortho position to the amino group is occupied by hydrogen, with a benzo-trichlorid bodyin the resence of sulfur.

2. The process 0 producing thiazole de-V rivatives of the anthraquinone series by acting on 2.6-diamino-anthraquinone with benzo-trichlorid in the resence of sulfur.

In testimony whereo I have hereunto set my hand in the presence of two subscribing FILIIP KACER.

Witnesses: I

J. Am; Lnorn,

- JOSEPH 

